2015/05/18 by Assaf Rinot
Mathematics · #Homotopy and Cohomology in Algebraic Topology #Advanced Topology and Set Theory #Advanced Operator Algebra Research
paper · doi:10.1112/blms/bdv025
By a 35-year-old theorem of Shelah, □ λ + ♦ ( λ + ) does not imply for regular uncountable cardinals λ. Here, it is proved that □ λ + ♦ ( λ + ) is equivalent to for every singular cardinal λ.